<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template v-slot="scope">
            <el-row :class="['bdbottom' ,i1 === 0 ? 'bdtop' : '' ,'vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级权限和三级权限 -->
              <el-col :span="19">
                <!-- 循环嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop' ,'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <!-- 渲染三级权限 -->
                        <el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete"  @click="removeUsereById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

     <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="30%"
      @close="addDialogClosed"
      >
      <!-- 选中的内容主题区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef"  label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisble"
      width="50%"
      @close="editDialogClosed"
      >
      <!-- 主题区域 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 页脚按钮 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisble = false">取 消</el-button>
        <el-button type="primary" @click="editUserinfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
      >
      <!-- 主体部分 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <!-- 脚部分 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色的列表数据
      rolelist: [],
      // 控制添加角色对话框的显示和隐藏
      addDialogVisible: false,
      // 控制编辑角色对话框的显示和隐藏
      editDialogVisble: false,
      // 控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 默认选中的ID值数组
      defKeys: [],
      // 当前即将分配权限的角色ID
      roleId: '',
      // 树形控件的属性绑定对象
      treeProps: {
        // 看到的名称
        label: 'authName',
        children: 'children'
      },
      // 用户的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色表单的效验规则
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名字', trigger: 'blur' }, { min: 3, max: 10, message: '角色名的长度在3~10个字符之间', trigger: 'blur' }
        ]
      },
      // 编辑角色的表单数据
      editForm: {},
      // 编辑角色的效验规则
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名字', trigger: 'blur' }, { min: 2, max: 10, message: '角色名的长度在2~10个字符之间', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }

      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 点击确定添加角色 并请求数据
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return

        const { data: res } = await this.$http.post('roles', this.addForm)
        console.log(res)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败！')
        }

        this.$message.success('添加角色成功！')
        // 关闭对话框
        this.addDialogVisible = false
        // 重新刷新数据
        this.getRolesList()
      })
    },
    // 点击取消后重置表单
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 点击编辑按钮弹框
    async showEditDialog(id) {
      this.editDialogVisble = true
      const { data: res } = await this.$http.get('roles/' + id)
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('查询数据失败')
      }
      this.editForm = res.data
    },
    // 监听编辑角色对话框的关闭事件
    editDialogClosed() {
      // 清空改写内容
      this.$refs.editFormRef.resetFields()
    },
    // 点击确定编辑角色
    editUserinfo() {
      this.$refs.editFormRef.validate(async valid => {
        console.log(valid)
        if (!valid) return
        // 请求数据
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('编辑角色失败！')
        }

        this.$message.success('编辑角色成功！')
        // 关闭弹框
        this.editDialogVisble = false
        // 重新请求数据
        this.getRolesList()
      })
    },
    // 根据id删除对应用户信息
    async removeUsereById(id) {
      // 弹框提示用户删除用户
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 如果用户确认删除返回值是字符串 confirm
      // 如果用户取消删除则返回值是字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }

      this.$message.success('删除用户成功')
      this.getRolesList()
    },
    // 根据ID删除对应的用户权限
    async removeRightById(role, rightId) {
      // 弹框提示是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }

      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }

      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }

      // 获取到的权限数据保存到data中
      this.rightsList = res.data
      console.log(this.rightsList)

      // 递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys)
      console.log(this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的ID，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含 children 属性，则是三级属性
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的分配权限
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        // element自带的函数，获得已经选择的叶子和根（抽象：叶子是最后一级中的每一片叶子，根是叶子的集合）
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)

      // 把数组拼接成以逗号拼接的字符串
      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      console.log(res)

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
